Agent Name

p,p'-Oxybis(benzenesulfonyl hydrazide)

Alternative Name

OBSH

CAS Number

80-51-3

Formula

C12-H14-N4-O5-S2

Major Category

Plastics & Rubber

Synonyms

OBSH; 4,4'-Oxybis(benzenesulfonhydrazide); 4,4'-Oxybis(benzenesulfonic acid hydrazide); 4,4'-Oxybis(benzenesulfonic acid) dihydrazide; 4,4'-Oxybis(benzenesulfonyl hydrazide); 4,4'-Oxydi(benzenesulfonic acid hydrazide); 4,4'-Oxydi(benzenesulfonyl dihydrazide); 4,4'-Oxydibenzenesulfonic acid dihydrazide; Benzenesulfonic acid, 4,4'-oxybis-, dihydrazide; Benzenesulfonic acid, 4,4'-oxydi-, dihydrazide; Cellmic S; Celmike S; Celogen; Celogen OT; Cenitron OB; Diphenyl ether 4,4'-disulfohydrazide; Diphenyloxide-4,4'-disulfohydrazide; Genitron ob; OBSH; Oxybis(benzenesulfonylhydrazide); Oxybisbenzenesulfonic acid dihydrazide; Serogen; Zhenitron OV; p,p'-Oxybis(benzenesulfohydrazide); p,p'-Oxybis(benzenesulfonylhydrazine); p,p'-Oxybisbenzene disulfonylhydrazide; [ChemIDplus]

Category

Curing Agents (Aromatic)

Description

White odorless solid; [HSDB] Fine, white powder; [ACGIH]

Sources/Uses

Used as a blowing agent for sponge rubber and expanded plastics; [HSDB] Used as an additive to polymers to make sponge rubber cosmetic puffs, electrostatographic toners, buoyant seats, insulation and packing materials, rubber products (insoles, gaskets, and stoppers), adhesives, sealants, and leather substitutes; Used as a blowing agent--releases nitrogen when heated; [ACGIH]

Comments

A skin, eye, and mucous membrane irritant; Moderately toxic by inhalation, ingestion, and skin absorption; [CAMEO] "Health effects of exposure to the substance have not been investigated adequately." [ICSC] An irritant; [MSDSonline] Limited toxicology data available; Oral LD50 (rats) = 2.3 g/kg; Dermal LD50 (rabbits) >200 mg/kg; By analogy to the TLV for hydrazine, the recommended TLV for OBSH is sufficiently low to protect against ocular irritation and suspected genotoxicity and carcinogenicity; TLV Basis: Teratogenic effect; [ACGIH]

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TLV (ACGIH)

0.1 mg/m3, inhalable fraction

Adverse Effects
Reproductive Toxin

Yes

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